ClipArt ETC
"The gold leaves are gummed on the two sides of a flat piece of metal carried by a stout stem, which passes through the top of a glass shade and ends in a flat disc. By means of this disc we may convert the instrument into Volta's condensing electroscope." — Encyclopedia Britannica, 1893

Bennets Electroscope

"The gold leaves are gummed on the two sides of a flat piece of metal carried by a stout stem, which…